Петровић, Марија, Предраг Петровић, and Мина Петровић. “THE DEMONSTRATION BIOGAS PRODUCTION FROM ORGANIC AND SECONDARY WASTE FROM AGRICULTURE”. Ekonomika poljoprivrede 58, no. 1 Book 1 (December 1, 2011). Accessed July 3, 2024. https://ea.bg.ac.rs/index.php/EA/article/view/825.